CXMLAccessor Class
Allows you to access data sources as string data when you have no knowledge of the data store's schema (underlying structure).
class CXMLAccessor : public CDynamicStringAccessorW
Members
Methods
Retrieves the column information. |
|
Retrieves the entire contents of a table by rows. |
Remarks
However, CXMLAccessor differs from CDynamicStringAccessorW in that it converts all data accessed from the data store as XML-formatted (tagged) data. This is especially useful for output to XML-aware Web pages. The XML tag names will match the data store's column names as closely as possible.
Use CDynamicAccessor methods to obtain column information. You use this column information to create an accessor dynamically at run time.
The column information is stored in a buffer created and managed by this class. Obtain column information using GetXMLColumnData or obtain column data by rows using GetXMLRowData.
Example
void DoCXMLAccessorTest()
{
HRESULT hr = CoInitialize(NULL);
CDataSource ds;
CSession ss;
CTable<CXMLAccessor> rs;
// The following is an example initialization string:
hr = ds.OpenFromInitializationString(L"Provider=Microsoft.Jet.OLEDB.4.0;"
L"User ID=Admin;Data Source=Snippet.mdb;Mode=Share Deny None;"
L"Extended Properties=\"\";Jet OLEDB:System database=\"\";"
L"Jet OLEDB:Registry Path=\"\";Jet OLEDB:Database Password=\"\";"
L"Jet OLEDB:Engine Type=5;Jet OLEDB:Database Locking Mode=1;"
L"Jet OLEDB:Global Partial Bulk Ops=2;Jet OLEDB:Global Bulk Transactions=1;"
L"Jet OLEDB:New Database Password=\"\";Jet OLEDB:Create System Database=False;"
L"Jet OLEDB:Encrypt Database=False;Jet OLEDB:Don't Copy Locale on Compact=False;"
L"Jet OLEDB:Compact Without Replica Repair=False;Jet OLEDB:SFP=False");
hr = ss.Open(ds);
hr = rs.Open(ss, L"Customer"); // Customer is a table name in the database.
CStringW strColumnInfo;
rs.GetXMLColumnData(strColumnInfo);
wprintf_s(L"%s\n", strColumnInfo);
hr = rs.MoveFirst();
while(SUCCEEDED(hr) && hr != DB_S_ENDOFROWSET)
{
CStringW strRowData;
rs.GetXMLRowData(strRowData);
wprintf_s(L"%s\n", strRowData);
hr = rs.MoveNext();
}
ss.Close();
ds.Close();
CoUninitialize();
}
Requirements
Header: atldbcli.h
See Also
Reference
CDynamicParameterAccessor Class